28453131 has 12 divisors (see below), whose sum is σ = 46970352. Its totient is φ = 16258896.

The previous prime is 28453129. The next prime is 28453151. The reversal of 28453131 is 13135482.

It is a happy number.

It is not a de Polignac number, because 28453131 - 2¹ = 28453129 is a prime.

It is a super-2 number, since 2×28453131² = 1619161327406322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28453095 and 28453104.

It is not an unprimeable number, because it can be changed into a prime (28453151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 225756 + ... + 225881.

It is an arithmetic number, because the mean of its divisors is an integer number (3914196).

Almost surely, 2^28453131 is an apocalyptic number.

28453131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28453131 is a deficient number, since it is larger than the sum of its proper divisors (18517221).

28453131 is a wasteful number, since it uses less digits than its factorization.

28453131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451650 (or 451647 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 28453131 is about 5334.1476357521. The cubic root of 28453131 is about 305.2882020095.

The spelling of 28453131 in words is "twenty-eight million, four hundred fifty-three thousand, one hundred thirty-one".